Abstract
In surfactant-polymer (SP) flooding process where SP mixtures encounter complex fluid-fluid and fluid-rock interactions, the S/P concentration ratio could be different from the original ratio. It is necessary to determine the surfactant concentration and polymer concentration separately. However, the surfactant analysis is hard because of interferences of polymer present in the solution. This work aims to provide a high-performance liquid chromatography method to determine different kinds of surfactant concentrations in SP formulations. Three different types of surfactants (anionic SA, cationic SC and non-ionic SN) were and a partially hydrolyzed polyacrylamide (HPAM) were chosen to be mixed as SA-HPAM, SC-HPAM and SN-HPAM. For the elimination of the polymer interferences, a pre-treatment of the mixtures using 1% NaClO at high temperature for certain hours was conducted. The gel permeation chromatography (GPC) and high-performance liquid chromatography (HPLC) results confirmed that the polymer was fully degraded without destruction of surfactant molecular structures. The experimental showed excellent linearity between the HPLC signals to the surfactant concentration after the treatment. Besides that, the effects of salinity and polymer/surfactant ratio proved to have no impact on the accuracy of the surfactant concentration result.
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Hou, J., Han, M., Alkateeb, A., Alsofi, A. (2022). Determination of Surfactant Concentration in Surfactant-polymer Mixtures for Improving Oil Production. In: Lin, J. (eds) Proceedings of the 2021 International Petroleum and Petrochemical Technology Conference . IPPTC 2021. Springer, Singapore. https://doi.org/10.1007/978-981-16-9427-1_4
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DOI: https://doi.org/10.1007/978-981-16-9427-1_4
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